Is ther any reverse polarity mechanism inside nRF51822?

[balaji]

Hi,

Is there any reverse polarity mechanism inside the nrf51822 IC? If externally we don't use it, and user connect power supply in reverse way, what will happen with nrf51822?

Regards, Balaji

[mnhs]

In the datasheet it is written that the maximum possible negative voltage on the VDD pin is -0.3V. When I was working with NRF24L01+, once I reversed the polarity of the chip by mistake and it was not working anymore. Thus, I would expect similar behaviour on all nRF chips and in fact all microcontrollers and other sensitive electronic circuits. When you go over the maximum ratings, the performance of the chip will be reduced or it will stop working completely. The only way to solve this problem is to protect it using external circuitry.

[balaji]

Thank you..